Having already convinced small businesses and folks to use their phone to buy and sell goods, today Square is announcing Square Market, an online marketplace to, well, buy and sell goods.

Now, local artisanal purveyors who might already use Square Register can go from selling locally to slinging goods anywhere without the overhead cost of paying someone to build out an ecommerce site. As Square CEO and Twitter co-founder Jack Dorsey told me, "it's as easy as flipping a switch."

From Square Market, you can also share items to Twitter, Facebook or Pinterest and immediately purchase anything that tickles your fancy. So in the event that you find a cute shop that uses Square in San Francisco or Portland or wherever folks like to put things on things, you can continue to buy from them even when you're no longer in that city.

Even more interesting is that Square built this new ecommerce platform in just three months, Dorsey tells me. Square Market goes live tonight. Now go buy some fancy coffee. Or not. [Square]